Robert, I got nuthin'. I can't image it's the shape. Since it's slip cast, it should be uniform thickness. I guess a mold imperfection is a plausible theory, hard to say. You have used that glaze on other items and they didn't crack? Very frustrating!

The rest of the stuff is looking really cool though ~ the cigar box and the barrels. I even got on FaceBook with my son's account (don't tell ATP or GROG) and checked out your Mars Attacks cards. The level of detail you are putting into them is amazing for the number of cards you have to do.
_________________ATTENTION MEMBERS! If you take the TC War Canoe on a head hunting party, be sure to remove the decapitated bodies before returning it. See club bylaws for more details

Glaze and clay need to be matched well for same shrinkage. The only way to say it's the clay's fault is a full fire without glaze. If it still cracks you need to fix clay (probably slower firing, etc..)

Gene, Mike and Badd Tiki! Thanks so much for the input. I don't think there is anything wrong with the mold. If anything I'd say more the design of the mug...not sure if that matters. These have all survived the bisque firing with no issues...no cracks or anything. Miles of Munktiki suggested to me that perhaps the glazes I'm using are not compatible. He suggested I do 1 glaze inside and out. So I will be trying that. Wendy has also offered to fire one for me so I'l be sending her a bisqued, glazed mug ready to go.

Thanks for the help! We'll crack this case soon! I hope!

Here's the latest on my Kava Kava painting:

_________________Tiki Tower
The Art of Robert Jimenez
http://www.tikitower.com

I'm going to go with the glazes not being compatible also. Recently i had one of my Bob'O'Nuts crack. There were four in the kiln and two were done in a custom colour for someone and it was one of those but why the other one didn't crack i have no idea.

Other than that the only time i've ever had any mugs crack in the glaze firing was when i first started ceramics. The four that it happened to all had the same brand glaze on the inside (different colours) but the glaze on the outside was one brand on one mug and a different brand all together on the other three (the same green in this case). Since then i have mixed various brands together, inside and out and never had a problem.

The stowaway mug is awesome! The little detail of the eye peeking out of the bottom is great!

Of course I absolutely dig the Mars Attacks! stuff! The Martian at the tiki bar is GREAT!

This latest painting... forgive me... I don't understand the reference... so it looks like a cross between Punch of Punch and Judy fame, and witchie poo from HR Puff N Stuff. So, umm yeah nightmare fuel. Sorry... sorry... I guess that shows my age doesn't it? The painting is great, but if only it would stop looking at me like that... that hideous grin, that blind clouded and pale vulture eye...

On the periphery of TIKI. Some of you may have heard of GOLD DUST LOUNGE (they played Hukilau this past June). They're a great South Florida band mixing surf, exotica, spy...Russell Mofsky, the band leader and guitarist, is running a Kickstrater campaign for their new album. I've painted the cover for it. Click the link below to hear some of the amazing tracks (Hidden Lake is my favrite) from the record and maybe pre order the album! There's also a of of kind pledge opportunity to purchase a 1/1 print plus a pencil study of the cover.

It was suggested to me to try the same glaze inside and out on the Moai mug. I did and it survived! Not sure if that's the true issue, I'll be doing a bit more experimenting. Barrel are coming out fine!

_________________Tiki Tower
The Art of Robert Jimenez
http://www.tikitower.com

On 2013-09-09 08:28, danlovestikis wrote:Problem solved? It looks really good in red. You worked hard to get to this point. I hope it goes perfectly from now on. Cheers, Wendy

Thanks Wendy. Well, I've fired a few in the last week or so and when using the same glaze inside and out it hasn't cracked. So I think I'm going to go that route. I think I'm only going to do about 20 of these and retire the design. I'm working on a few new ones!

Just listed these at the store. Red is sold. More coming soon.

_________________Tiki Tower
The Art of Robert Jimenez
http://www.tikitower.com

Glad to see that's working out Robert. Now what happens if you use the same brand and type of glaze (Duncan Envision for example) but just in a different color?
_________________ATTENTION MEMBERS! If you take the TC War Canoe on a head hunting party, be sure to remove the decapitated bodies before returning it. See club bylaws for more details